Answer:
Why is the crust made of the lightest
materials, and the core the heavy
metals?
Step-by-step explanation:
Many geologists believe that as the Earth cooled the heavier, denser materials sank to the center and the lighter materials rose to the top. Because of this, the crust is made of the lightest materials (rock- basalts and granites) and the core consists of heavy metals (nickel and iron).
Hope that helped.